DE102014212794A1 - Oszillationsantriebsvorrichtung - Google Patents

Abstract

The invention is based on an oscillatory drive device for a handheld power tool (12a; 12b; 12c; 12d; 12e; 12f; 12g) having at least one input shaft (14a; 14b; 14c; 14d; 14e; 14f; 14g) with at least one output shaft (12a; 16a; 16b; 16c; 16d; 16e; 16f; 16g) and having at least one input shaft (14a; 14b; 14c; 14d; 14e; 14f; 14g) with the output shaft (16a; 16b; 16c; 16d; 16e; 16f 16g) operatively connecting the gear unit (18a; 18b; 18c; 18d; 18e; 18f; 18g) which includes at least one eccentric member (20a; 20b; 20c; 20d; 20e; 20f; 20g) for oscillating drive of the output shaft (16a; 16b, 16c, 16d, 16e, 16f, 16g). It is proposed that the gear unit (18a; 18b; 18c; 18d; 18e; 18f; 18g) comprise at least one further eccentric element (22a; 22b; 22c; 22d; 22e; 22f; 22g) for an oscillating drive of the output shaft (16a; 16b, 16c, 16d, 16e, 16f, 16g).

Description

State of the art

There has already been proposed an oscillatory drive apparatus for a portable power tool having at least one input shaft, at least one output shaft, and at least one gear unit integrally connecting the input shaft to the output shaft and comprising at least one eccentric member for oscillating driving of the output shaft.

Disclosure of the invention

The invention is based on an oscillation drive device for a handheld power tool, with at least one input shaft, with at least one output shaft and with at least one transmission unit operatively connecting the input shaft to the output shaft, which comprises at least one eccentric element for oscillating drive of the output shaft.

It is proposed that the gear unit comprises at least one further eccentric element to an oscillating drive of the output shaft. The at least two eccentric elements of the gear unit are each provided to an oscillating drive of the output shaft. An "oscillation drive device" is to be understood in this context in particular as a device which is provided, as a result of a drive force and / or a drive torque, a reciprocating movement of an element, in particular the output shaft of the device, about an axis in a defined angular range to create. At least one drive element, in particular the input shaft of the oscillation drive device, is preferably driven in rotation by means of a drive unit of the handheld power tool. The drive unit is preferably designed as an electric motor. However, it is also conceivable that the drive unit is designed as a fluid drive unit, as a combustion drive unit, as a hybrid drive unit, etc. Furthermore, in this context under a "hand tool" in particular a work piece processing machine, but advantageously a drill, a drill and / or percussion hammer, a saw, a planer, a screwdriver, a milling cutter, a grinder, an angle grinder, a garden tool and / or a multifunctional tool. Furthermore, in this context, an "eccentric element" should be understood to mean, in particular, an element which is provided to effect a force on a third element facing away from a rotation axis on a rotation axis, a distance between the axis of rotation and the outer surface is non-uniform along a circumferential direction. Preferably, this is to be understood in particular as a disk-shaped component whose center and preferably also its center of gravity is arranged at a distance from an axis of rotation of the component. A "disk-shaped component" should in particular be understood to mean a component whose material extent in the radial direction is at least 10% of a diameter of the component, with an axial extent of the component preferably being less than 10% of the diameter. Including that an eccentric element is provided "to an oscillating drive of the output shaft" is to be understood in this context, in particular, that a force which acts from the eccentric directly to another element, at least approximately directly, is used to drive the output shaft , Preferably, this is to be understood in particular as meaning that the force which acts on the eccentric element on an outer surface facing away from the axis of rotation directly on a further element, at least approximately free of losses is transmitted to the output shaft. In particular, "at least approximately free of losses" should be understood to mean that at least 60%, preferably at least 75%, and particularly preferably at least 90%, of the force is transmitted to the output shaft. By "intended" is intended to be understood in particular specially designed and / or equipped. The fact that an object is intended for a specific function should in particular mean that the object fulfills and / or executes this specific function in at least one application and / or operating state.

The inventive design of the oscillation drive device, a reliable oscillating drive of the output shaft can be achieved. Preferably, a force transmission can thereby be distributed to at least two eccentric elements. As a result, in turn, a load on components can be kept low. Furthermore, twisting can be avoided, whereby noise can be kept low. In particular, it can be achieved that at least only 50% of a force is transmitted via each of the eccentrics.

It is also proposed that the further eccentric element of the gear unit has an angular offset relative to the eccentric element. The further eccentric element of the gear unit preferably has an angular offset relative to the eccentric element about an axis of rotation of the input shaft. Preferably, the angular offset is at least approximately 180 °. In this context, an "angular offset" is intended in particular to mean a displacement of a maximum deflection, that is to say the point of a maximum radius between a rotation axis and one of the rotation axis remote outer surface, the further eccentric element with respect to a Maximalauslenkung of the eccentric element, viewed around a rotation axis understood. Furthermore, in this context, "at least approximately" should in particular be understood to mean that a deviation from a predefined value amounts to a maximum of 20%, preferably a maximum of 10% and particularly preferably a maximum of 5% of the predetermined value. As a result, in particular a force transmission from two opposite directions can be achieved by at least two eccentric elements. In particular, such an approximately evenly distributed power transmission can be achieved, which in turn can be advantageously kept low stress on components.

Furthermore, it is proposed that the eccentric elements of the gear unit are arranged on the input shaft along a rotational axis of the input shaft spaced from each other. Preferably, the eccentric elements of the gear unit are substantially spaced from each other. In this case, "substantially spaced apart" is to be understood in particular as meaning that a distance between the eccentric elements, in particular along a rotation axis of the input shaft, is at least 1 cm, preferably at least 2 cm and particularly preferably at least 3 cm. As a result, it can be achieved, in particular, that a force transmission through the eccentric elements originates from different, mutually spaced points. As a result, in particular an advantageously uniform and distributed power transmission can be achieved.

It is further proposed that the eccentric elements are arranged on opposite sides of an imaginary plane in which a rotation axis of the output shaft is located and which encloses a minimum angle of at least 70 ° with a rotation axis of the input shaft. Preferably, it should be understood in particular an imaginary plane in which the axis of rotation of the output shaft is located and which extends at least approximately perpendicular to the axis of rotation of the input shaft. As a result, in particular, a power transmission to the output shaft can be realized from two opposite directions. In particular, it can be achieved that a force is preferably transmitted symmetrically to the output shaft.

It is further proposed that a first of the eccentric elements is arranged on the input shaft along the axis of rotation of the input shaft and a second of the eccentric elements on the input shaft along the axis of rotation of the input shaft behind an intersection of the axes of rotation of the input shaft and the output shaft. If there is no direct point of intersection between the axes of rotation of the input shaft and the output shaft, this is to be understood in particular to be a point on the axis of rotation of the input shaft at which a distance to the axis of rotation of the output shaft is minimal. In this context, "arranged in front of or behind an intersection" is to be understood in particular to mean that the first of the eccentric elements, viewed from the direction of a drive unit and along the axis of rotation of the input shaft, is arranged in front of or behind the intersection. Preferably, this is to be understood in particular as meaning that the first of the eccentric elements, viewed along a force flow during operation and along the axis of rotation of the input shaft, is arranged in front of or behind the point of intersection. As a result, in particular a particularly advantageous power transmission to the output shaft can be realized from two opposite directions. In particular, it can be achieved that a force is transmitted preferably at least approximately symmetrically to the output shaft.

It is also proposed that the gear unit has at least one motion converter, via which the eccentric elements are operatively connected to the output shaft. In this context, a "motion converter" is to be understood as meaning, in particular, a unit which is intended to at least partially remove a movement performed by at least one element and to convert it into a differing movement. Preferably, the converted motion is transferred to another element. The movement is preferably converted into a different type of movement. Particularly preferably, this is to be understood as meaning, in particular, a unit which is intended to at least partially remove a rotational movement performed by at least one element and to convert it into an oscillatory movement. Various types of movement which appear sensible to a person skilled in the art are conceivable, for example a rotational movement, a translatory movement, an oscillatory movement or the like. In this way, in particular, an advantageous operative connection can be achieved. Preferably, thereby a reliable power transmission can be achieved. Further, it can be reliably converted into a movement of movement of the eccentric elements in an oscillatory motion.

Furthermore, it is proposed that the at least one motion converter has at least one first connection element which bears against the first eccentric element and has at least one second connection element which bears against the second eccentric element. Preferably, the first connecting element and / or the second connecting element is / are designed as an arm. In principle, however, it would also be another to a person skilled in the art as a reasonable appearance of the connecting element conceivable. In this context, a "connecting element" should be understood to mean, in particular, an element which is intended to remove at least part of a movement, in particular directly on one of the eccentric elements. Preferably, this is to be understood in particular an element which is intended to directly remove a partial movement on one of the eccentric elements. Particularly preferred is to be understood in particular an element which is intended to directly remove a partial movement of one of the eccentric elements and to transmit to the output shaft. As a result, movement on the eccentric elements can preferably be removed particularly reliably. Furthermore, in particular a force can be distributed to two connecting elements, whereby a load on the connecting elements can be kept low.

It is further proposed that the output shaft is cantilevered on a side facing the input shaft. Preferably, the output shaft is cantilevered at one end to which the motion converter is positively and / or non-positively connected to the output shaft. By "cantilevered" is to be understood in this context, in particular, that at least one load attack on the output shaft takes place outside a distance between two outermost bearing points. Preferably, this is to be understood in particular as meaning that at least one load application takes place on the output shaft at a freely projecting end of the output shaft. Preferably, a load application of the motion converter takes place at the freely projecting end of the output shaft. As a result, advantageously a space requirement, in particular in the region of the input shaft and the output shaft, can be kept low. In particular, in a symmetrical power transmission of the motion converter to the output shaft, a load on the cantilevered end of the output shaft can be kept low.

It is further proposed that the output shaft has at least one recess through which the input shaft extends. Preferably, the output shaft has, at least in a region of the recess, a diameter which is greater than a diameter of the input shaft. Particularly preferably, the recess has a diameter which is greater than a diameter of the input shaft. In particular, a contact between the input shaft and the output shaft can be avoided even with an oscillating movement of the output shaft. The recess is preferably formed by a continuous recess. Preferably, the recess is bounded on all sides in at least one plane by a material of the output shaft. In principle, however, it would also be conceivable that the recess is delimited along a central axis in an angular range of at most 180 °, preferably of at most 240 ° and particularly preferably of not more than 300 °, by a material of the output shaft. It would be conceivable in particular that the recess, viewed in a sectional plane parallel to the axis of rotation, is C-shaped bounded by a material of the output shaft, that is, preferably open in three directions extending perpendicular to each other. As a result, in particular a collision between the input shaft and the output shaft can be avoided. Furthermore, it can thus be made possible that the output shaft can be mounted above the input shaft, in particular therefore on a side facing away from the motion converter. As a result, a bearing of the output shaft can be made in particular in a region in which space is available and, in particular, there is no lack of space. Furthermore, this can be achieved in particular a large distance between two outermost bearing points.

In principle, however, it would also be conceivable that the output shaft is at least partially guided past the input shaft.

It is also proposed that the oscillation drive device has at least one bearing element for supporting the output shaft, which is arranged between a connection region, of the output shaft and the motion converter, and the input shaft. Preferably, the bearing element is arranged on one of the input shaft facing the end of the output shaft. Preferably, the bearing element is arranged at one end of the output shaft, at which a load attack of the motion converter takes place. In this context, a "bearing element" is to be understood as meaning, in particular, a machine element which is provided for guiding mutually movable components. There are various, one skilled in the art seem reasonable bearing elements conceivable, but in particular should be understood as a plain bearing or particularly preferably a roller bearing. As a result, a reliable storage of the output shaft can be achieved with low space requirement advantageous. Furthermore, in particular a structurally simple mounting and / or a structurally simple design of the output shaft can be achieved.

Furthermore, it is proposed that the output shaft consists of at least two partial shafts, which are arranged spaced from one another and the input shaft extends through a gap between the first partial shaft and the second partial shaft. Preferably, the partial waves of the output shaft to a power transmission over connected the motion converter. Preferably, the sub-waves are effectively connected via the motion converter with the input shaft. Particularly preferably, the partial waves have an identical axis of rotation. As a result, in particular a collision between the input shaft and the output shaft can be avoided. Furthermore, it can be made possible that the output shaft can be mounted on two opposite sides of the input shaft. As a result, a bearing of the output shaft can be made in particular in a region in which space is available and, in particular, there is no lack of space. Preferably, in particular a large distance between two outermost bearing points can be achieved thereby.

It is further proposed that the oscillation drive device has at least one first spring element which is provided to pull and / or to the first connecting element of the motion converter, for a permanent contacting of the first connecting element with an outer surface of the first eccentric element, in the direction of the first eccentric element to press. In addition or alternatively, the oscillation drive device has at least one second spring element, which is provided to pull and / or to press the second connection element of the motion converter into a permanent contacting of the second connection element with an outer surface of the second eccentric element in the direction of the second eccentric element. A "spring element" is to be understood in particular as a macroscopic element which has at least one extension that is elastically changeable by at least 10%, in particular by at least 20%, preferably by at least 30% and particularly advantageously by at least 50% in a normal operating state , And in particular generates a dependent on a change in the extension and preferably proportional to the change counterforce, which counteracts the change. An "extension" of an element should, in particular, be understood to mean a maximum distance between two points of a vertical projection of the element onto a plane. By a "macroscopic element" is meant in particular an element with an extension of at least 1 mm, in particular of at least 5 mm and preferably of at least 10 mm. There are various, a person skilled in the sense appearing spring elements conceivable, but in particular should be understood as a coil spring. As a result, in particular a structurally simple design of the connecting elements can be achieved. Furthermore, it can be achieved reliably contacting the connecting elements with the eccentric elements.

It is further proposed that the oscillation drive device has a vibration compensation unit which has at least one compensation mass which is driven to compensate for a vibration in at least one operating state counter to a direction of movement of the output shaft. The balancing mass is in particular not provided for driving the output shaft. Frictional and / or bearing forces between the balancing mass and the output shaft should not be understood in particular as driving forces. A "balancing mass" is to be understood as a component which is intended to compensate vibrations in an operating state at least partially, preferably completely. By "vibrations" is meant, in particular, unwanted movements of the oscillation drive device and, in particular, of an entire hand-held power tool, which are in particular caused by moments of inertia, which are caused by an oscillating movement. By means of the balancing mass, vibrations in an operating state of the oscillation drive device can be reduced in particular, preferably reduced to zero. As a result, an ease of use of a hand tool for a user can be advantageously increased. In addition, noise caused by unwanted vibrations in an operating state of the oscillation drive device, can be advantageously reduced, whereby the ease of use for the user can be increased particularly advantageous. In addition, by the reduction of the vibrations, in particular the reduction of the vibrations to zero, in an operating state of the oscillation drive device, an advantageously precise machining result can be achieved.

In addition, it is proposed that the gear unit comprises at least one further eccentric element to an oscillating drive of the balancing mass. Preferably, the at least one further eccentric element, which is provided for an oscillating drive of the balancing mass, formed by the eccentric elements, which are provided for an oscillating drive of the output shaft, separately. Alternatively, the at least one further eccentric element, which is provided for an oscillating drive of the balancing mass, may also be formed integrally with at least one of the eccentric elements, which are provided for an oscillating drive of the output shaft. Preferably, the at least one further eccentric element, which is provided for an oscillating drive of the balancing mass, formed integrally with the first of the eccentric elements, which is provided for an oscillating drive of the output shaft. Particularly preferably, the further eccentric element forms an elliptical eccentric with the eccentric element. By "one piece" should in particular at least cohesively be understood connected, for example, by a welding process, a gluing process, a Anspritzprozess and / or another, the skilled person appear useful process, and / or advantageously formed in one piece, such as by a production of a cast and / or by a production in a one-component or multi-component injection molding process and advantageously from a single blank. As a result, in particular an advantageous drive of the balancing mass can be achieved.

It is also proposed that the further eccentric element, which is provided for an oscillating drive of the balancing mass, has a maximum radius of rotation which is greater than a maximum radius of rotation of the eccentric elements, which are provided for an oscillating drive of the output shaft. In this context, a "maximum radius of rotation" is to be understood as meaning, in particular, a maximum extent, viewed in the radial direction relative to an axis of rotation, from an axis of rotation to an outer surface facing away from the axis of rotation. As a result, in particular a differing deflection of the eccentric elements can be achieved. This can be achieved that the balancing mass moves faster than the output shaft. Since the balancing mass is intended to compensate for an angular momentum of the output shaft, in this case a balancing mass with a low mass moment of inertia can be used. The low mass moment of inertia can be compensated by the increased speed of the balancing mass. As a result, a weight of the balancing weight and thus also of the oscillation drive device can be kept low.

Furthermore, it is proposed that the gear unit has at least one further motion converter which operatively connects the eccentric element, which is provided to an oscillating drive of the balancing mass, with the balancing mass. Preferably, the motion converter has at least one connecting element, which rests against the eccentric element, which is provided for an oscillating drive of the balancing mass. As a result, movement can preferably be transmitted from the eccentric element to the balancing mass. In particular, this makes it possible to remove a movement on the eccentric element in a particularly reliable manner.

It is further proposed that the oscillation drive device has at least one spring element which is arranged between the connecting element of the further motion converter and the first connecting element of the motion converter. Preferably, the at least one spring element is provided to ensure a permanent contacting of the connecting element of the further motion converter with the further eccentric element, which is provided for an oscillating drive of the balancing mass. Particularly preferably, the at least one spring element is also provided to ensure a permanent contacting of the first connecting element of the motion converter with the eccentric element, which is provided for an oscillating drive of the output shaft. As a result, in particular a structurally simple design of the connecting elements can be achieved. Furthermore, it can be achieved reliably contacting the connecting elements with the eccentric elements.

The oscillation drive device according to the invention should not be limited to the application and embodiment described above. In particular, in order to fulfill a mode of operation described herein, the oscillation drive device according to the invention can have a number deviating from a number of individual elements, components and units mentioned herein.

drawing

Further advantages emerge from the following description of the drawing. In the drawing, seven embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.

Show it:

1 a hand tool with an oscillation drive device according to the invention and with a drive unit in a schematic, perspective side view,

2 a partial area of the hand tool with the oscillation drive device according to the invention and a part of the drive unit in a schematic side view,

3 a partial area of the hand power tool with the oscillation drive device according to the invention and a part of the drive unit in a schematic plan view,

4 a partial area of a hand tool with an alternative oscillation drive device according to the invention and a part of a drive unit in a schematic side view,

5 a partial area of a hand tool machine with a further alternative oscillation drive device according to the invention and a part of a drive unit in a schematic side view,

6 a partial area of a hand tool machine with a further alternative oscillation drive device according to the invention and a part of a drive unit in a schematic side view,

7 a partial area of a hand tool machine with a further alternative oscillation drive device according to the invention and a part of a drive unit in a schematic side view,

8th a partial area of a hand tool machine with a further alternative oscillation drive device according to the invention and a part of a drive unit in a schematic plan view,

9 a partial area of the further alternative oscillation drive device according to the invention in a schematic sectional view along the section line IX,

10 a partial area of a hand tool with a further alternative oscillation drive device according to the invention and a part of a drive unit in a schematic plan view and

11 a portion of the other alternative Oszillationsantriebsvorrichtung invention in a schematic sectional view along the section line XI.

Description of the embodiments

1 shows an oscillating drivable hand tool 12a , The hand tool machine 12a is formed by an oscillating, removable multifunctional tool. The hand tool machine 12a has a housing serving as a handle 58a and one in the housing 58a integrated switch 60a for switching on and off the power tool 12a on. In addition, the hand tool includes 12a a non-illustrated, formed by an electric motor drive unit 62a , The drive unit 62a will be over the switch 60a the hand tool machine 12a started. The desk 60a is directly on the drive unit 62a arranged. Furthermore, the hand tool has 12a an oscillation drive device 10a on. The drive unit 62a and the oscillation drive device 10a are each in the case 58a the hand tool machine 12a arranged. Furthermore, the hand tool has 12a an oscillating drivable spindle 56a on. The spindle 56a includes an output shaft 16a the oscillation drive device 10a and a tool holder 64a , The output shaft 16a and the tool holder 64a are firmly connected. In principle, however, another embodiment that would appear meaningful to a person skilled in the art would also be conceivable. The tool holder 64a is in a front area of the power tool 12a arranged. The tool holder 64a is to a recording of an insert tool 66a intended. In one of the tool holders 64a remote area of the power tool 12a has the hand tool machine 12a a power cable 68a for powering the drive unit 62a on. In principle, however, it would also be conceivable that the drive unit 62a is powered by an accumulator with energy.

The oscillation drive device 10a has an input shaft 14a and the output shaft 16a on. The input shaft 14a is directly with the drive unit 62a connected. The input shaft 14a is in an operation of the power tool 12a through the drive unit 62a driven. Further, the oscillation driving device 10a a gear unit 18a on. The gear unit 18a connects the input shaft 14a and the output shaft 16a operatively. The gear unit 18a comprises a first eccentric element 20a to an oscillating drive of the output shaft 16a , Furthermore, the transmission unit comprises 18a a second eccentric element 22a to an oscillating drive of the output shaft 16a , The first eccentric element 20a and the second eccentric element 22a are each to an oscillating drive of the output shaft 16a intended. The first eccentric element 20a and the second eccentric element 22a are each designed as eccentric disc. Furthermore, the first eccentric element 20a and the second eccentric element 22a each on the input shaft 14a arranged. The eccentric elements 20a . 22a are each at different positions on the input shaft 14a pressed. In principle, however, another form of attachment of the eccentric elements that appears appropriate to a person skilled in the art would also be desirable 20a . 22a at the input shaft 14a conceivable. The second eccentric element 22a the gear unit 18a facing the first eccentric element 20a an angular offset. The second eccentric element 22a facing the first eccentric element 20a an angular offset about a rotation axis 28a the input shaft 14a on. The angular offset is 180 °. Furthermore, the eccentric elements 20a . 22a the gear unit 18a on the input shaft 14a along the axis of rotation 28a the input shaft 14a spaced apart. The eccentric elements 20a . 22a are on the input shaft 14a substantially spaced ( 2 ).

The eccentric elements 20a . 22a the gear unit 18a are on opposite sides of an imaginary plane 24a arranged, in which a rotation axis 26a the output shaft 16a lies and with the axis of rotation 28a the input shaft 14a a minimum angle of at least 70 °. The rotation axis 28a the input shaft 14a is perpendicular to the imaginary plane 24a , The eccentric elements 20a . 22a each have an identical distance to the imaginary plane 24a on. The first eccentric element 20a is from the direction of the drive unit 62a considered before the imaginary plane 24a arranged. The second eccentric element 22a is from the direction of the drive unit 62a viewed behind the imaginary plane. The first eccentric element 20a is on the input shaft 14a along the axis of rotation 28a the input shaft 14a in front of an intersection 30a the axes of rotation 26a . 28a the input shaft 14a and the output shaft 16a arranged. The second eccentric element 22a is on the input shaft 14a along the axis of rotation 28a the input shaft 14a behind the intersection 30a the axes of rotation 26a . 28a the input shaft 14a and the output shaft 16a arranged. The point of intersection 30a lies in the imaginary plane 24a , Furthermore, the eccentric elements 20a . 22a each an identical distance to the intersection 30a the axes of rotation 26a . 28a the input shaft 14a and the output shaft 16a on ( 2 ).

Furthermore, the transmission unit 18a a motion converter 32a on. About the motion converter 32a are the eccentric elements 20a . 22a with the output shaft 16a connected. The motion converter 32a is intended to the movement of the eccentric elements 20a . 22a to convert it into an oscillatory motion and this on the output shaft 16a transferred to. The motion converter 32a has a first connection element 34a and a second connecting element 36a on. The connecting elements 34a . 36a are each designed as an arm. Furthermore, the motion converter 32a a fastening ring 70a on. The connecting elements 34a . 36a are each integral with the mounting ring 70a connected. The connecting elements 34a . 36a each protrude on opposite sides of the mounting ring 70a , The first connection element 34a lies on the first eccentric element 20a at. The first connection element 34a indicates a secure concern with the first eccentric element 20a , on one of the mounting ring 70a opposite side, two extensions 72a . 72a ' on. The extensions 72a . 72a ' are, parallel to the axis of rotation 28a the input shaft 14a considered, in a plane perpendicular to the axis of rotation 26a the output shaft 16a on opposite sides of the first eccentric element 20a arranged. The extensions 72a . 72a ' surround the eccentric element 20a partially. The second connection element 36a is located on the second eccentric element 22a at. The second connection element 36a indicates a secure concern with the second eccentric element 22a , on one of the mounting ring 70a opposite side, two extensions 74a . 74a ' on. The extensions 74a . 74a ' are, parallel to the axis of rotation 28a the input shaft 14a considered, in a plane perpendicular to the axis of rotation 26a the output shaft 16a on opposite sides of the second eccentric element 22a arranged. The extensions 74a . 74a ' surround the eccentric element 22a partially. The first connection element 34a and the second connecting element 36a are identical. The fastening ring 70a is fixed to the output shaft 16a connected. The fastening ring 70a is on the output shaft 16a pressed on ( 3 ).

In principle, however, it would also be conceivable that a concern of the first connecting element 34a on the first eccentric element 20a and a concern of the second connecting element 36a on the second eccentric element 22a not over the two extensions 72a . 72a ' . 74a . 74a ' but realized via two spring elements. It would be particularly conceivable that the Oszillationsantriebsvorrichtung 10a a spring element, which is provided to the first connecting element 34a of the motion converter 32a , to a permanent contact of the first connecting element 34a with an outer surface of the first eccentric element 20a , in the direction of the first eccentric element 20a to draw. The spring element could in particular between the first connecting element 34a and an inside of the housing 58a be clamped. In addition, it would be conceivable that the oscillation drive device 10a a further spring element, which is provided to the second connecting element 36a of the motion converter 32a , to a permanent contacting of the second connecting element 36a with an outer surface of the second eccentric element 22a , in the direction of the second eccentric element 22a to draw.

The output shaft 16a is completely on one side of the input shaft 14a arranged. The output shaft 16a is below the input shaft 14a arranged. Furthermore, the oscillation drive device 10a two bearing elements 40a . 76a to a storage of the output shaft 16a on. The bearing elements 40a . 76a are each designed as rolling bearings. The bearing elements 40a . 76a are each designed as ball bearings. The bearing elements 40a . 76a are each with an inner ring on the output shaft 16a pressed. The bearing elements 40a . 76a Both are on one of the input shaft 14a opposite side of the motion converter 32a on the output shaft 16a arranged. The bearing elements 40a . 76a are between the mounting ring 70a of the motion converter 32a and the tool holder 64a arranged. The bearing elements 40a . 76a are each with an outer ring not further visible in the housing 58a the hand tool machine 12a attached. The fastening ring 70a of the motion converter 32a is at a freely projecting end of the output shaft 16a on the output shaft 16a pressed. The output shaft 16a is on one of the input shaft 14a facing side flying.

A rotary movement of the drive unit 62a and that of the drive unit 62a driven input shaft 14a is in an operating state of the power tool 12a on the on the input shaft 14a pressed first and second eccentric element 20a . 22a transfer. The first and the second eccentric element 20a . 22a describe an orbit deviating from a circle about the axis of rotation 28a the input shaft 14a , The extensions 72a . 72a ' . 74a . 74a ' the first and second connecting element 34a . 36a of the motion converter 32a each take a component of the non-circular movement of the first and the second eccentric element 20a . 22a in a direction perpendicular to the axis of rotation 26a the output shaft 16a and perpendicular to the axis of rotation 28a the input shaft 14a stands up. This component generates on the motion converter 32a an oscillating movement, wherein the first and second connecting element 34a . 36a , in rotation around the output shaft 16a considered, each experiencing an identical rotational movement. The oscillating movement of the motion converter 32a is over the mounting ring 70a on the output shaft 16a and on the output shaft 16a over the tool holder 64a fixed insert tool 66a transfer.

In the 4 to 11 Six further embodiments of the invention are shown. The following descriptions and the drawings are essentially limited to the differences between the exemplary embodiments, with reference in principle to the same reference components, in particular with respect to components with the same reference numerals, to the drawings and / or the description of the other embodiments, in particular 1 to 3 , can be referenced. To distinguish the embodiments of the letter a is the reference numerals of the embodiment in the 1 to 3 readjusted. In the embodiments of the 4 to 11 the letter a is replaced by the letters b to g.

4 shows a portion of a hand tool 12b with an alternative oscillation drive device according to the invention 10b and a part of a drive unit 62b , The oscillation drive device 10b has an input shaft 14b and an output shaft 16b on. The input shaft 14b is directly with the drive unit 62b connected. The input shaft 14b is in an operation of the power tool 12b through the drive unit 62b driven. Further, the oscillation driving device 10b a gear unit 18b on. The gear unit 18b connects the input shaft 14b and the output shaft 16b operatively. The gear unit 18b comprises a first eccentric element 20b to an oscillating drive of the output shaft 16b , Furthermore, the transmission unit comprises 18b a second eccentric element 22b to an oscillating drive of the output shaft 16b , The first eccentric element 20b and the second eccentric element 22b are each to an oscillating drive of the output shaft 16b intended.

The output shaft 16b crosses the input shaft 14b , The output shaft 16b extends over the input shaft 14b and the input shaft 14b extends over the output shaft 16b , The output shaft 16b has a recess 38b on. The recess 38b extends perpendicular to the axis of rotation 26b the output shaft 16b by a material of the output shaft 16b , The recess 38b extends completely through a material of the output shaft 16b , The recess 38b extends approximately parallel, depending on the position of the output shaft 16b , to a rotation axis 28b the input shaft 14b , The input shaft 14b extends through the recess 38b , The output shaft 16b points in a region of the recess 38b a diameter larger than a diameter of the input shaft 14b in the area of an intersection 30b the axes of rotation 26b . 28b the input shaft 14b and the output shaft 16b , The recess 38b also has a diameter that is larger than a diameter of the input shaft 14b in the area of the point of intersection 30b , This may cause a contact between the input shaft 14b and the output shaft 16b at an oscillating movement of the output shaft 16b be avoided. Furthermore, the oscillation drive device 10b two bearing elements 40b . 76b to a storage of the output shaft 16b on. The bearing elements 40b . 76b are each designed as rolling bearings. The bearing elements 40b . 76b are each designed as ball bearings. The bearing elements 40b . 76b are each with an inner ring on the output shaft 16b pressed. The first bearing element 40b is on one of a tool holder 64b opposite side of the input shaft 14b on the output shaft 16b arranged. The first bearing element 40b is at one of the tool holder 64b opposite end of the output shaft 16b arranged. The first bearing element 40b is above the input shaft 14b arranged. The second bearing element 76b is on one of the input shaft 14b opposite side of a motion converter 32b on the output shaft 16b arranged. The second bearing element 76b is between one fixing ring 70b of the motion converter 32b and the tool holder 64b arranged. The bearing elements 40b . 76b are each not visible with an outer ring in a housing of the power tool 12b attached.

5 shows a portion of a hand tool 12c with an alternative oscillation drive device according to the invention 10c and a part of a drive unit 62c , The oscillation drive device 10c has an input shaft 14c and an output shaft 16c on. The input shaft 14c is directly with the drive unit 62c connected. The input shaft 14c is in an operation of the power tool 12c through the drive unit 62c driven. Further, the oscillation driving device 10c a gear unit 18c on. The gear unit 18c connects the input shaft 14c and the output shaft 16c operatively. The gear unit 18c comprises a first eccentric element 20c to an oscillating drive of the output shaft 16c , Furthermore, the transmission unit comprises 18c a second eccentric element 22c to an oscillating drive of the output shaft 16c , The first eccentric element 20c and the second eccentric element 22c are each to an oscillating drive of the output shaft 16c intended.

The output shaft 16c is completely on one side of the input shaft 14c arranged. The output shaft 16c is below the input shaft 14c arranged. Furthermore, the oscillation drive device 10c two bearing elements 40c . 76c to a storage of the output shaft 16c on. The bearing elements 40c . 76c are each designed as rolling bearings. The bearing elements 40c . 76c are each designed as ball bearings. The bearing elements 40c . 76c are each with an inner ring on the output shaft 16c pressed. The first bearing element 40c is between a connection area, from the output shaft 16c and a motion converter 32c , and the input shaft 14c arranged. The first bearing element 40c is between a mounting ring 70c and the input shaft 14c arranged. The first bearing element 40c is at one of a tool holder 64c opposite end of the output shaft 16c arranged. The second bearing element 76c is on one of the input shaft 14c opposite side of the motion converter 32c on the output shaft 16c arranged. The second bearing element 76c is between the mounting ring 70c of the motion converter 32c and the tool holder 64c arranged. The bearing elements 40c . 76c are each not visible with an outer ring in a housing of the power tool 12c attached.

6 shows a portion of a hand tool 12d with an alternative oscillation drive device according to the invention 10d and a part of a drive unit 62d , The oscillation drive device 10d has an input shaft 14d and an output shaft 16d on. The input shaft 14d is directly with the drive unit 62d connected. The input shaft 14d is in an operation of the power tool 12d through the drive unit 62d driven. Further, the oscillation driving device 10d a gear unit 18d on. The gear unit 18d connects the input shaft 14d and the output shaft 16d operatively. The gear unit 18d comprises a first eccentric element 20d to an oscillating drive of the output shaft 16d , Furthermore, the transmission unit comprises 18d a second eccentric element 22d to an oscillating drive of the output shaft 16d , The first eccentric element 20d and the second eccentric element 22d are each to an oscillating drive of the output shaft 16d intended.

The output shaft 16d partially crosses the input shaft 14d , The output shaft 16d extends over the input shaft 14d and the input shaft 14d extends over the output shaft 16d , The output shaft 16d consists of two partial waves 42d . 44d , The partial waves 42d . 44d have an identical axis of rotation 26d on. The second part wave 44d is with a tool holder 64d connected. The two partial waves 42d . 44d are spaced from each other. Between the partial waves 42d . 44d is a gap 46d arranged. The input shaft 14d extends through the gap 46d between the first part wave 42d and the second part wave 44d , The partial waves 42d . 44d are about a motion converter 32d the gear unit 18d connected. Furthermore, the oscillation drive device 10d two bearing elements 40d . 76d to a storage of the output shaft 16d on. The bearing elements 40d . 76d are each designed as rolling bearings. The bearing elements 40d . 76d are each designed as ball bearings. The bearing elements 40d . 76d are each with an inner ring on the output shaft 16d or the partial waves 42d . 44d the output shaft 16d pressed. The first bearing element 40d is at the first part wave 42d arranged. The first bearing element 40d is on one of the input shaft 14d applied end of the first part wave 42d arranged. The second bearing element 76d is at the second part wave 44d arranged. The second bearing element 76d is between the input shaft 14d and the tool holder 64d at the output shaft 16d arranged. The bearing elements 40d . 76d are each not visible with an outer ring in a housing of the power tool 12d attached.

Furthermore, the transmission unit 18d the motion converter 32d on. About the motion converter 32d are the eccentric elements 20d . 22d with the output shaft 16d connected. About the motion converter 32d are the eccentric elements 20d . 22d effective with the partial waves 42d . 44d the output shaft 16d connected. The motion converter 32d is provided for the movement of the eccentric elements 20d . 22d to convert it into an oscillatory motion and this on the output shaft 16d transferred to. The motion converter 32d has two first connecting elements 34d . 34d ' and two second connection elements 36d . 36d ' on. The connecting elements 34d . 34d ' . 36d . 36d ' are each designed as an arm. Furthermore, the motion converter 32d two mounting rings 70d . 70d ' on. The connecting elements 34d . 36d are each integral with the first mounting ring 70d connected and the fasteners 34d ' . 36d ' are each integral with the second mounting ring 70d ' connected. The connecting elements 34d . 34d ' . 36d . 36d ' each protrude on opposite sides of the associated mounting ring 70d . 70d ' , The first fasteners 34d . 34d ' lie on the first eccentric element 20d at. The first fasteners 34d . 34d ' point to a secure concern on the first eccentric element 20d , on one of the mounting rings 70d . 70d ' opposite side, two common extensions 72d . 72d ' on. About the extensions 72d . 72d ' are the first fasteners 34d . 34d ' connected with each other. The extensions 72d . 72d ' are to, parallel to a rotation axis 28d the input shaft 14d considered, in a plane perpendicular to the axis of rotation 26d the output shaft 16d on opposite sides of the first eccentric element 20d arranged. The extensions 72d . 72d ' surround the eccentric element 20d partially. The second connecting elements 36d . 36d ' lie on the second eccentric element 22d at. The second connecting elements 36d . 36d ' point to a secure concern to the second eccentric element 22d , on one of the mounting rings 70d . 70d ' opposite side, two common extensions 74d . 74d ' on. About the extensions 74d . 74d ' are the second connecting elements 36d . 36d ' connected with each other. The extensions 74d . 74d ' are to, parallel to the axis of rotation 28d the input shaft 14d considered, in a plane perpendicular to the axis of rotation 26d the output shaft 16d on opposite sides of the second eccentric element 22d arranged. The extensions 74d . 74d ' surround the eccentric element 22d partially. The first fasteners 34d . 34d ' and the second connecting elements 36d . 36d ' are identical. The first fastening ring 70d is fixed with the second part wave 44d the output shaft 16d connected. The second fastening ring 70d ' is fixed with the first part wave 42d the output shaft 16d connected. The fastening rings 70d . 70d ' are each on the partial waves 42d . 44d the output shaft 16d pressed. The partial waves 42d . 44d the output shaft 16d are to a power transmission via the motion converter 32d connected.

7 shows a portion of a hand tool 12e with an alternative oscillation drive device according to the invention 10e and a part of a drive unit 62e , The oscillation drive device 10e of the fifth embodiment is approximately identical to the oscillation driving device 10d of the fourth embodiment. The oscillation drive device 10e only has a motion converter 32e with respect to the motion converter 32d shortened connecting elements 34e . 34e ' . 36e . 36e ' on. In addition, a distance between a first eccentric element 20e a gear unit 18e and a second eccentric element 22e the gear unit 18e lower. Because the power transmission between an input shaft 14e and an output shaft 16e over the two eccentric elements 20e . 22e must be done, each of the eccentric elements 20e . 22e only half the power transmitted. Therefore, the fasteners 34e . 34e ' . 36e . 36e ' of the motion converter 32e be made very short.

8th shows a portion of a hand tool 12f with an alternative oscillation drive device according to the invention 10f and a part of a drive unit 62f , The oscillation drive device 10f has an input shaft 14f and an output shaft 16f on. The input shaft 14f is directly with the drive unit 62f connected. The input shaft 14f is in an operation of the power tool 12f through the drive unit 62f driven. Further, the oscillation driving device 10f a gear unit 18f on. The gear unit 18f connects the input shaft 14f and the output shaft 16f operatively. The gear unit 18f comprises a first eccentric element 20f to an oscillating drive of the output shaft 16f , Furthermore, the transmission unit comprises 18f a second eccentric element 22f to an oscillating drive of the output shaft 16f , The first eccentric element 20f and the second eccentric element 22f are each to an oscillating drive of the output shaft 16f intended.

Furthermore, the transmission unit 18f a motion converter 32f on. About the motion converter 32f are the eccentric elements 20f . 22f with the output shaft 16f connected. The motion converter 32f is provided for the movement of the eccentric elements 20f . 22f to convert it into an oscillatory motion and this on the output shaft 16f transferred to. The motion converter 32f has a first connection element 34f and a second connecting element 36f on. The connecting elements 34f . 36f are each designed as an arm. Furthermore, the motion converter 32f a fastening ring 70f on. The connecting elements 34f . 36f are each integral with the mounting ring 70f connected. The connecting elements 34f . 36f each protrude on opposite sides of the mounting ring 70f , The first connection element 34f lies on the first eccentric element 20f at. The second connection element 36f is located on the second eccentric element 22f at. The connecting elements 34f . 36f lie in each case based on a rotation axis 28f the input shaft 14f on opposite sides of the respectively associated eccentric element 20f . 22f at. As a result, in particular a uniform force distribution can be achieved. In principle, however, it would also be conceivable that the connecting elements 34f . 36f each based on the axis of rotation 28f the input shaft 14f on the same side on the respectively associated eccentric element 20f . 22f issue. The first connection element 34f and the second connecting element 36f are each mirrored. The fastening ring 70f is fixed to the output shaft 16f connected. The fastening ring 70f is on the output shaft 16f pressed.

Furthermore, the transmission unit 18f another eccentric element 52f on. The further eccentric element 52f is designed as an eccentric disc. The further eccentric element 52f is on the input shaft 14f arranged. Furthermore, the further eccentric element 52f on the input shaft 14f pressed. The further eccentric element 52f is directly next to the first eccentric element 20f on the input shaft 14f pressed. In principle, however, would be another, a professional appear appropriate sense position of another eccentric element 52f on the input shaft 14f conceivable. The further eccentric element 52f facing the first eccentric element 20f an angular offset about the axis of rotation 28f the input shaft 14f on. The angular offset is 180 °. The further eccentric element 52f is to an oscillating drive a balancing mass 50f a vibration compensation unit 48f intended. In principle, however, it would also be conceivable that the transmission unit 18f two further eccentric elements 52f to an oscillating drive of a balancing mass 50f has, respectively, on opposite sides of an intersection 30f the axes of rotation 28f the input shaft 14f and the output shaft 16f are arranged.

The oscillation drive device 10f has the vibration compensation unit 48f on. The vibration compensation unit 48f has the balancing mass 50f on. The balancing mass 50f is intended to compensate for a vibration. The balancing mass 50f is in an operation for compensating a vibration against a moving direction of the output shaft 16f driven. The balancing mass 50f is not visible further rotatable on the output shaft 16f stored. In principle, however, an alternative arrangement would be conceivable. The balancing mass 50f is from another motion converter 78f driven.

The gear unit 18f shows the other motion converter 78f on. The motion converter 78f connects the further eccentric element 52f that leads to an oscillating drive of the balancing mass 50f is provided, in terms of effect with the balancing mass 50f , The motion converter 78f is intended to the movement of the further eccentric element 52f to convert it into an oscillatory motion and this on the balancing mass 50f transferred to. The motion converter 78f has a connection element 80f on. The connecting element 80f is designed as an arm. The connecting element 80f is integral with the balancing mass 50f educated. The connecting element 80f protrudes from the balancing mass 50f in the direction of the further eccentric element 52f , The connecting element 80f lies with one of the balancing mass 50f opposite end to the other eccentric element 52f at. The connecting element 80f lies with respect to the axis of rotation 28f the input shaft 14f on a first connecting element 34f opposite side on the further eccentric element 52f at.

Further, the oscillation driving device 10f a spring element 82f on. The spring element 82f is between the connecting element 80f further motion converter 78f and the first connection element 34f of the motion converter 32f arranged. The spring element 82f is intended to provide a permanent contact of the connecting element 80f further motion converter 78f with the further eccentric element 52f that leads to an oscillating drive of the balancing mass 50f is intended to ensure. Furthermore, the spring element 82f intended to provide a permanent contact of the first connection element 34f of the motion converter 32f with the first eccentric element 20f that is an oscillating drive of the output shaft 16f is intended to ensure. In addition, the spring element 82f provided indirectly, even a permanent contact of the second connecting element 36f of the motion converter 32f with the second eccentric element 22f that is an oscillating drive of the output shaft 16f is intended to ensure.

The further eccentric element 52f that leads to an oscillating drive of the balancing mass 50f is provided has a maximum radius of rotation r ₁ , which is greater than a maximum radius of rotation r _{2 of} the first eccentric element 20f and the second eccentric element 22f leading to an oscillating drive of the output shaft 16f are provided. In principle, however, it would also be conceivable that the maximum radius of rotation r ₁ and the maximum radius of rotation r _{2 are the} same size. The eccentric elements 20f . 22f . 52f each have an identical diameter, however, has the further eccentric element 52f a distance s ₁ between the axis of rotation 28f the input shaft 14f and a geometric center 84f the further eccentric element 52f which is greater than a distance s ₂ between the axis of rotation 28f the input shaft 14f and a geometric center 86f the first and second eccentric element 20f . 22f ( 9 ).

A rotary movement of the drive unit 62f and that of the drive unit 62f driven input shaft 14f is in an operating state of the power tool 12f on the on the input shaft 14f pressed first and second eccentric element 20f . 22f as well as on the further eccentric element 52f transfer. The first and the second eccentric element 20f . 22f as well as the further eccentric element 52f describe an orbit deviating from a circle about the axis of rotation 28f the input shaft 14f , The first and second connecting element 34f . 36f of the motion converter 32f as well as the connecting element 80f further motion converter 78f each take a component of the non-circular movement of the first and the second eccentric element 20f . 22f and the further eccentric element 52f in a direction perpendicular to the axis of rotation 26f the output shaft 16f and perpendicular to the axis of rotation 28f the input shaft 14f stands up. This component generates at the motion transducers 32f . 78f an oscillating movement. The movement of the motion converter 32f is a movement of the further motion converter 78f directed against. The oscillating movement of the motion converter 32f is over the mounting ring 70f on the output shaft 16f and on the output shaft 16f transferred via the tool holder attached insert tool. The oscillating motion of the further motion converter 32f is on the one piece with the connecting element 80f further motion converter 32f connected and rotatable on the output shaft 16f mounted balancing mass 50f transfer.

Due to the phase shift between the oscillating output shaft 16f and the balancing mass 50f , vibrations that are in an operating state of the power tool 12f by moments of inertia, which are caused by an oscillating movement of the insert tool, are caused by the balancing mass 50f balanced.

10 shows a portion of a hand tool 12g with an alternative oscillation drive device according to the invention 10g and a part of a drive unit 62g , The oscillation drive device 10g has an input shaft 14g and an output shaft 16g on. The input shaft 14g is directly with the drive unit 62g connected. The input shaft 14g is in an operation of the power tool 12g through the drive unit 62g driven. Further, the oscillation driving device 10g a gear unit 18g on. The gear unit 18g connects the input shaft 14g and the output shaft 16g operatively. The gear unit 18g comprises a first eccentric element 20g to an oscillating drive of the output shaft 16g , Furthermore, the transmission unit comprises 18g a second eccentric element 22g to an oscillating drive of the output shaft 16g , The first eccentric element 20g and the second eccentric element 22g are each to an oscillating drive of the output shaft 16g intended.

Furthermore, the transmission unit 18g a motion converter 32g on. About the motion converter 32g are the eccentric elements 20g . 22g with the output shaft 16g connected. The motion converter 32g is intended to the movement of the eccentric elements 20g . 22g to convert it into an oscillatory motion and this on the output shaft 16g transferred to. The motion converter 32g has a first connection element 34g and a second connecting element 36g on. The connecting elements 34g . 36g are each designed as an arm. Furthermore, the motion converter 32g a fastening ring 70g on. The connecting elements 34g . 36g are each integral with the mounting ring 70g connected. The connecting elements 34g . 36g each protrude on opposite sides of the mounting ring 70g , The first connection element 34g lies on the first eccentric element 20g at. The second connection element 36g is located on the second eccentric element 22g at. The connecting elements 34g . 36g lie in each case based on a rotation axis 28g the input shaft 14g on opposite sides of the respectively associated eccentric element 20g . 22g at. As a result, in particular a uniform force distribution can be achieved. In principle, however, it would also be conceivable that the connecting elements 34g . 36g each based on the axis of rotation 28g the input shaft 14g on the same side on the respectively associated eccentric element 20g . 22g issue. The first connection element 34g and the second connecting element 36g are each mirrored. The fastening ring 70g is fixed to the output shaft 16g connected. The fastening ring 70g is on the output shaft 16g pressed.

Furthermore, the transmission unit 18g two further eccentric elements 52g . 54g on. The other eccentric elements 52g . 54g are on the input shaft 14g arranged. Furthermore, the other eccentric elements 52g . 54g on the input shaft 14g pressed. The first further eccentric element 52g is integral with the first eccentric element 20g trained and on the input shaft 14g pressed. The first further eccentric element 52g and the first eccentric element 20g together form a first elliptical eccentric disc 88g where the rotation axis 28g the input shaft 14g in a geometric center of the first eccentric disc 88g lies. Furthermore, the second further eccentric element 54g integral with the second eccentric element 22g trained and on the input shaft 14g pressed. The second further eccentric element 54g and the second eccentric element 22g together form a second elliptical eccentric disc 90g where the rotation axis 28g the input shaft 14g in a geometric center of the second eccentric disc 90g lies. The eccentric discs 88g . 90g are each on opposite sides of an intersection 30g the axes of rotation 28g the input shaft 14g and the output shaft 16g arranged ( 11 ).

The oscillation drive device 10g has the vibration compensation unit 48g on. The vibration compensation unit 48g has the balancing mass 50g on. The balancing mass 50g is intended to compensate for a vibration. The balancing mass 50g is in an operation for compensating a vibration against a moving direction of the output shaft 16g driven. The balancing mass 50g is not visible further rotatable on the output shaft 16g stored. In principle, however, an alternative arrangement would be conceivable. The balancing mass 50g is from another motion converter 78g driven.

The gear unit 18g shows the other motion converter 78g on. The other motion converter 78g connects the eccentric discs 88g . 90g effective with the balancing mass 50g , The motion converter 78g is provided for the movement of the eccentric discs 88g . 90g to convert it into an oscillatory motion and this on the balancing mass 50g transferred to. The motion converter 78g has two fasteners 80g . 92g on. The connecting elements 80g . 92g are designed as an arm. The connecting elements 80g . 92g are integral with the balancing mass 50g educated. The connecting elements 80g . 92g protrude on opposite sides of the balancing mass 50g in the direction of the other eccentric elements 52g . 54g , The connecting elements 80g . 92g each lie with one of the balancing mass 50g opposite end on one of the eccentric discs 88g . 90g at. The first connection element 80g further motion converter 78g lies with respect to the axis of rotation 28g the input shaft 14g on a first connecting element 34g opposite side on the first eccentric disc 88g at. The second connection element 92g further motion converter 78g lies with respect to the axis of rotation 28g the input shaft 14g on a second connecting element 36g opposite side on the second eccentric disc 90g at.

Further, the oscillation driving device 10g two spring elements 82g . 94g on. The spring elements 82g . 94g are between the fasteners 80g . 92g further motion converter 78g and the connecting elements 34g . 36g of the motion converter 32g arranged. The spring elements 82g . 94g are intended to provide a permanent contact of the fasteners 80g . 92g further motion converter 78g with the eccentric discs 88g . 90g to ensure. Furthermore, the spring elements 82g . 94g intended to provide a permanent contact of the fasteners 34g . 36g of the motion converter 32g with the eccentric discs 88g . 90g to ensure.

A rotary movement of the drive unit 62g and that of the drive unit 62g driven input shaft 14g is in an operating state of the power tool 12g on the on the input shaft 14g pressed eccentric discs 88g . 90g transfer. The pressed eccentric discs 88g . 90g describe an orbit deviating from a circle about the axis of rotation 28g the input shaft 14g , The connecting elements 34g . 36g of the motion converter 32g as well as the connecting elements 80g . 92g further motion converter 78g each take a component of the non-circular motion of the first and second pressed eccentric discs 88g . 90g in a direction perpendicular to the axis of rotation 26g the output shaft 16g and perpendicular to the axis of rotation 28g the input shaft 14g stands up. This component generates at the motion transducers 32g . 78g an oscillating movement. The movement of the motion converter 32g is a movement of the further motion converter 78g directed against. The oscillating movement of the motion converter 32g is over the mounting ring 70g on the output shaft 16g and on the output shaft 16g transferred via the tool holder attached insert tool. The oscillating motion of the further motion converter 32g is on the one piece with the fasteners 80g . 92g further motion converter 32g connected and rotatable on the output shaft 16g mounted balancing mass 50g transfer.

Claims (13)

Oscillation drive device for a handheld power tool ( 12a ; 12b ; 12c ; 12d ; 12e ; 12f ; 12g ), with at least one input shaft ( 14a ; 14b ; 14c ; 14d ; 14e ; 14f ; 14g ), with at least one output shaft ( 16a ; 16b ; 16c ; 16d ; 16e ; 16f ; 16g ) and with at least one the input shaft ( 14a ; 14b ; 14c ; 14d ; 14e ; 14f ; 14g ) with the output shaft ( 16a ; 16b ; 16c ; 16d ; 16e ; 16f ; 16g ) operatively connecting transmission unit ( 18a ; 18b ; 18c ; 18d ; 18e ; 18f ; 18g ), the at least one eccentric element ( 20a ; 20b ; 20c ; 20d ; 20e ; 20f ; 20g ) to an oscillating drive of the output shaft ( 16a ; 16b ; 16c ; 16d ; 16e ; 16f ; 16g ), characterized in that the gear unit ( 18a ; 18b ; 18c ; 18d ; 18e ; 18f ; 18g ) at least one further eccentric element ( 22a ; 22b ; 22c ; 22d ; 22e ; 22f ; 22g ) to an oscillating drive of the output shaft ( 16a ; 16b ; 16c ; 16d ; 16e ; 16f ; 16g ). Oscillation drive device according to claim 1, characterized in that the eccentric elements ( 20a . 22a ; 20b . 22b ; 20c . 22c ; 20d . 22d ; 20e . 22e ; 20f . 22f ; 20g . 22g ) on opposite sides of an imaginary plane ( 24a ; 24b ; 24c ; 24d ; 24e ; 24f ; 24g ) are arranged, in which an axis of rotation ( 26a ; 26b ; 26c ; 26d ; 26e ; 26f ; 26g ) of the output shaft ( 16a ; 16b ; 16c ; 16d ; 16e ; 16f ; 16g ) and with a rotation axis ( 28a ; 28b ; 28c ; 28d ; 28e ; 28f ; 28g ) of the input shaft ( 14a ; 14b ; 14c ; 14d ; 14e ; 14f ; 14g ) includes a minimum angle of at least 70 °. Oscillation drive device according to claim 1 or 2, characterized in that a first of the eccentric elements ( 20a ; 20b ; 20c ; 20d ; 20e ; 20f ; 20g ) on the input shaft ( 14a ; 14b ; 14c ; 14d ; 14e ; 14f ; 14g ) along the axis of rotation ( 28a ; 28b ; 28c ; 28d ; 28e ; 28f ; 28g ) of the input shaft ( 14a ; 14b ; 14c ; 14d ; 14e ; 14f ; 14g ) in front of and a second of the eccentric elements ( 22a ; 22b ; 22c ; 22d ; 22e ; 22f ; 22g ) on the input shaft ( 14a ; 14b ; 14c ; 14d ; 14e ; 14f ; 14g ) along the axis of rotation ( 28a ; 28b ; 28c ; 28d ; 28e ; 28f ; 28g ) of the input shaft ( 14a ; 14b ; 14c ; 14d ; 14e ; 14f ; 14g ) behind an intersection ( 30a ; 30b ; 30c ; 30d ; 30e ; 30f ; 30g ) of the rotary axes ( 26a . 28a ; 26b . 28b ; 26c . 28c ; 26d . 28d ; 26e . 28e ; 26f . 28f ; 26g . 28g ) of the input shaft ( 14a ; 14b ; 14c ; 14d ; 14e ; 14f ; 14g ) and the output shaft ( 16a ; 16b ; 16c ; 16d ; 16e ; 16f ; 16g ) is arranged. Oscillation drive device according to one of the preceding claims, characterized in that the gear unit ( 18a ; 18b ; 18c ; 18d ; 18e ; 18f ; 18g ) at least one motion converter ( 32a ; 32b ; 32c ; 32d ; 32e ; 32f ; 32g ), over which the eccentric elements ( 20a . 22a ; 20b . 22b ; 20c . 22c ; 20d . 22d ; 20e . 22e ; 20f . 22f ; 20g . 22g ) operatively connected to the output shaft ( 16a ; 16b ; 16c ; 16d ; 16e ; 16f ; 16g ) are connected. Oscillatory drive device according to claim 4, characterized in that the at least one motion converter ( 32a ; 32b ; 32c ; 32d ; 32e ; 32f ; 32g ) at least a first connecting element ( 34a ; 34b ; 34c ; 34d . 34d '; 34e . 34e '; 34f ; 34g ), which on the first eccentric element ( 20a ; 20b ; 20c ; 20d ; 20e ; 20f ; 20g ) is applied, and at least a second connecting element ( 36a ; 36b ; 36c ; 36d . 36d '; 36e . 36e '; 36f ; 36g ), which on the second eccentric element ( 22a ; 22b ; 22c ; 22d ; 22e ; 22f ; 22g ) is present. Oscillatory drive device according to one of the preceding claims, characterized in that the output shaft ( 16a ) on one of the input shaft ( 14a ) facing side is cantilevered. Oscillatory drive device according to one of the preceding claims, characterized in that the output shaft ( 16b ) at least one recess ( 38b ), through which the input shaft ( 14b ). Oscillatory drive device at least according to claim 4, characterized by at least one bearing element ( 40c ) for supporting the output shaft ( 16c ), which between a connection region, from the output shaft ( 16c ) and the motion converter ( 32c ), and the input shaft ( 14c ) is arranged. Oscillatory drive device according to one of the preceding claims, characterized in that the output shaft ( 16d ; 16e ) from at least two partial waves ( 42d . 44d ; 42e . 44e ), which are arranged spaced from each other and the input shaft ( 14d ; 14e ) through a gap ( 46d ; 46e ) between the first partial wave ( 42d ; 42e ) and the second partial wave ( 44d ; 44e ). Oscillatory drive device according to one of the preceding claims, in particular according to a preamble of claim 1, characterized by a vibration compensation unit ( 48f ; 48g ), the at least one balancing mass ( 50f ; 50g ), which compensate for a vibration in at least one operating state against a direction of movement of the output shaft (FIG. 16f ; 16g ) is driven. Oscillation drive device according to claim 10, in particular according to a preamble of claim 1, characterized in that the gear unit ( 18f ; 18g ) at least one further eccentric element ( 52f ; 52g . 54g ) to an oscillating drive of the balancing mass ( 50f ; 50g ). Oscillatory drive device according to claim 11, in particular according to a preamble of claim 1, characterized in that the further eccentric element ( 52f ), which leads to an oscillating drive of the balancing mass ( 50f ) intended is, has a maximum radius of rotation (r ₁ ), which is greater than a maximum radius of rotation (r ₂ ) of the eccentric elements ( 20f . 22f ) leading to an oscillating drive of the output shaft ( 16f ) are provided. Hand tool machine, in particular hand tool machine ( 12a ; 12b ; 12c ; 12d ; 12e ; 12f ; 12g ) with an oscillating drivable spindle ( 56a ; 56b ; 56c ; 56d ; 56e ; 56f ; 56g ), with at least one oscillation drive device ( 10a ; 10b ; 10c ; 10d ; 10e ; 10f ; 10g ) according to any one of the preceding claims.

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